TABLE 2.

Individual antibiotic susceptibilities of 11 B. burgdorferi isolates to 15 quinolones and ceftriaxone^a

Isolate	MIC (μg/ml) for antibiotic:
	Nalidixic acid	Norfloxacin	Pefloxacin	Fleroxacin	Ofloxacin	Ciprofloxacin	Levofloxacin	Sparfloxacin	Grepafloxacin	Gatifloxacin	Trovafloxacin	Moxifloxacin	Clinafloxacin	Sitafloxacin	Gemifloxacin	Ceftriaxone
B. burgdorferi sensu stricto
B31	256	8	16	>16	4	1	2	0.50	0.25	0.50	0.50	1	0.50	0.25	0.06	0.03
LW2	256	8	16	>16	8	2	4	1	1	2	0.12	2	1	0.50	0.12	0.03
PKa-I	256	8	16	16	8	1	2	1	0.25	0.50	0.50	1	0.50	0.25	0.12	0.015
B. garinii
PTrob	256	4	32	>16	8	1	4	4	0.25	0.50	0.50	1	0.50	0.50	0.06	0.03
G1	256	4	16	>16	4	1	2	0.25	0.50	0.50	0.50	0.50	0.50	0.25	0.06	<0.015
PSth	256	2	8	8	2	0.50	1	0.50	0.12	0.25	0.50	0.50	0.50	0.12	0.06	0.015
B. afzelii
EB1	256	4	16	>16	4	1	2	0.50	0.50	0.50	1	1	1	0.25	0.12	0.03
FEM1	128	2	8	8	2	0.50	1	0.50	0.25	0.25	0.25	1	0.25	0.50	0.06	0.03
PKo	128	2	4	16	2	0.50	2	0.25	0.25	0.50	0.50	0.50	0.50	0.25	0.06	0.03
B. valaisiana VS116	512	8	32	>16	8	2	4	0.50	0.50	1	0.50	2	1	0.25	0.12	0.03
B. bissettii 25015	256	8	32	16	8	1	2	0.50	0.25	0.50	1	1	0.50	0.50	0.06	0.03

^aAntimicrobial susceptibilities were determined on three different days, and MICs for each isolate were reported as the median of three experiments.